Battery Cell Tab Connection With Bent Contact Arm Support
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Solution Overview
Problem
Current electrochemical energy storage cells face challenges in achieving reliable current conduction with a small space requirement, particularly in electric vehicles, where efficient integration and durable connections are crucial.
Innovation Solution
A method involving the positioning, bending, supporting, pressing, and connecting of a current conductor with a contact arm to the electrode stack, allowing the conductor arrangement to extend flatly along the stack, enabling precise and durable connections through localized welding, and using supporting elements to manage forces and ensure accurate alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the conductor arrangement is routed closely along the electrode stack to reduce space requirements, then the space requirement is reduced, but the connection reliability and current conduction may be compromised
Solution Approach 1:
The conductor arrangement is bent around the edge of the contact arm in a three-dimensional configuration, extending flatly along the side face of the electrode stack. This spatial reconfiguration allows the conductor to maintain close proximity to the electrode stack (reducing space) while preserving adequate contact surface area through the bent geometry that wraps around the contact arm edge.
Solution Approach 2:
A pressing force is applied to the conductor arrangement bearing on the first contact arm side face, increasing the contact pressure between the conductor and contact arm. This parameter change ensures reliable electrical connection and current conduction despite the compact routing configuration.
2Reliability
If a pressing force is applied to ensure accurate and durable connection, then the connection reliability is improved, but the contact arm may deform or misalign
Solution Approach 1:
The contact arm is supported on the second contact arm side face before the pressing force is applied. This preliminary support action prevents deformation and misalignment of the contact arm during the pressing operation, ensuring that the pressing force improves connection reliability without compromising the structural integrity or alignment of the contact arm.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method enhances current conduction reliability and reduces space requirements by creating a stable, accurate connection between the conductor arrangement and the current conductor, preventing damage and ensuring efficient energy transfer.
Implementation Method 1
a pressing force is exerted on the conductor arrangement bearing at least in sections on the first contact arm side face
Implementation Method 2
the conductor arrangement and the first contact arm side face may therefore be positioned precisely in relation to a focused laser beam, so that efficient use of the laser energy is made possible
Data Source
AI summary
A method for producing an electrochemical energy storage cell is provided. A current conductor, which is configured for electrically connecting an electrode stack to a cell terminal and has a contact arm, is positioned relative to the electrode stack such that an edge of the contact arm abuts a first lateral surface of a conductor arrangement that projects out of the electrode stack. The conductor arrangement is bent around the edge of the contact arm such that the first lateral surface of the conductor arrangement rests at least in part on a first contact arm lateral surface. The contact arm is supported on a second contact arm lateral surface opposite the first contact arm lateral surface. A contact pressure is exerted on the conductor arrangement resting at least in part on the first contact arm lateral surface, and the conductor arrangement is connected to the current conductor.